8) Essential Knowledge and Associated Skills (EKAS): This describes the essential skills and knowledge and their level, required for this unit. Evidence shall show that knowledge has been acquired of drafting and laying out an overhead distribution extension. All knowledge and skills detailed in this unit should be contextualised to current industry practices and technologies. KS01-TDS31A Power system overhead distribution extension Evidence shall show an understanding of the power system overhead distribution extension to an extent indicated by the following aspects: T1 Installation of overhead distribution conductors encompassing: Standards, codes, legislation, supply authority regulations and or enterprise requirements applicable to installing conductors and associated equipment Requirements for the use of overhead line construction manuals, system diagrams/plans and drawings - material lists, conductor size, type and route length. Constructions types and structures for distribution and sub transmission lines Types, sizes and characterises of overhead conductors Resources for the stringing and maintenance of conductors - types of low and high voltage overhead electrical conductor connections, causes and effects of poor electrical connections, reasons for and methods used to maintain standard phase sequencing, removing, repairing and replacing of damage conductors, minimum clearances between overhead conductors and low and high voltage structures. Techniques for conductor installation - types and application of tools, equipment and hardware, methods of stringing, tensioning and termination of low and high voltage conductors. T2 Installation of poles and or structures and hardware encompassing: Standards, codes, legislation, supply authority regulations and or enterprise requirements applicable to installing poles and associated hardware Requirements for the use of enterprise construction manuals, system diagrams/plans and drawings - characteristics and applications of different types of poles and associated hardware Techniques for installing poles and associated hardware - types of installation equipment/tools, excavation methods, types of footings/foundations, types of attachments, earthing systems, clearances between conductors, safe methods of erecting and stabling poles and or structures and cross arms. Techniques for maintenance of poles and associated hardware - stabilisation techniques for unstable poles, methods of strengthen poles, maintenance and replacement of high voltage insulators and cross arms. T3 Different types and function of distribution components encompassing: Commonwealth/State/Territory and local government legislation, Standards, codes, Commonwealth, State/Territory and local government legislation, supply authority regulations and or enterprise requirements applicable to the use and application of distribution components Requirements for the use of overhead line construction manuals, system diagrams/plans and drawings Types, function and characteristics of distribution components Safety policies and procedures precautions related to the handling and installing distribution components. T4 Enterprise specific switching diagrams and drawing encompassing: Types and application of enterprise specific switching drawings and documents - wiring and schematic diagrams and switching symbols, mechanical drawings dealing with switching operations, project charts, switching schedules, graphs, technical manuals and catalogues, instruction/work sheets. Interpretation of different system switching diagrams - LV system switching diagrams, DC traction supply sectioning diagrams, HV transmission and distribution system symbols and feeder plans, processes of updating switching diagrams. T5 Power distribution network documentation encompassing: Requirements for the use of manuals, system diagrams/plans and drawings and for plans such as work method statements for the control of OHS risks Types and application of power distribution network documentation drawings and documents - wiring and schematic diagrams, drawings and switching symbols, mechanical drawings dealing with the power distribution network, project charts, schedules, graphs, technical manuals and catalogues, instruction/worksheets sheets. Interpretation of different diagrams and documentation on LV and HV systems - overhead distribution extensions, underground distribution extensions, distribution substation, street lighting system. T6 Layout principles for overhead distribution encompassing: Commonwealth, State/Territory and local government legislation, Standards, codes, supply authority regulations and or enterprise requirements applicable to overhead distribution layout Requirements for the use of overhead line construction manuals, system diagrams/plans and drawings and for plans such as work method statements for the control of OHS risks Methods in determining material, equipment and tool lists - components types and quantity required, spacing of components such as equipment, poles, cross-arms, costings of items and components. Purchasing and contractual arrangements to include a requirement to eliminate OHS hazards, minimise risks and provide residual OHS risk information Determination of conductor size, type and route length - Resources needed for the stringing and maintenance of conductors Types of low LV and HV overhead electrical conductor connections. Minimum clearances between overhead conductors and low LV and/HV structures Estimation of the duration of overhead distribution extension project T7 Fundamentals of surveying for the purpose of producing an overhead or underground distribution extension encompassing: Commonwealth, State/Territory and local government legislation, Standards, codes, supply and aviation authority regulations and or enterprise requirements applicable to the surveying for an overhead and underground extension Techniques in measuring heights and distances Techniques in taking bearings angles of deviation using a compass Techniques in using a clinometer Techniques in recording and storage of data Requirements for the use of overhead line construction manuals, system diagrams/plans and drawings Techniques in plotting long spans - measuring stick, clinometer, trundle wheel, tapes, correction for sloping ground, distance across objects and range rods Techniques in pegging pole positions - foot path alignments, types of pegs, pegs of other authorities and locating survey pegs T8 Fundamentals of computer aided drafting (CAD) for drafting and layout of distribution extension and upgrades encompassing: Commonwealth, State/Territory and local government legislation, Standards, codes, supply authority regulations and or enterprise requirements applicable to the drafting and layouts of distribution extensions and upgrades Types of computer hardware and software, tools and equipment for the production of a draft and layout of distribution extension and or upgrade Techniques in storing and retrieving programs and files from the computer Identification and methods of retrieving and manipulating, digital symbols, designs, layouts, fonts and graphs stored in the computer Techniques in using the CAD package in following necessary commands and protocols in accordance with the operating instructions of the CAD software manufacturer Note: Examples include using file structure, menu utilisation, system library usage, data banking, achieving, file management and maintenance procedures Calculation of dimensions and drafting measurements using the computer Techniques in the preparation of preliminary sketches using the computer Techniques in using 2D computer graphics system and associated equipment to produce a distribution extension and or upgrade draft or layout Techniques to diagnosing basic faults in computer operation Requirements for aerial linework - planning, establishing and implementing relevant aviation authority clearances, determining system requirements, aircrew familiarisation with network operations and equipment, requirements for effective communications operations for aerial work. |